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Gross Anatomy Muscles > Posterior Leg Muscles > Flashcards

Posterior Leg Muscles Flashcards

1
Q

Gastrocnemius

Origin

A
  • Lateral head: lateral aspect of lateral condyle of femur

- Medial head: popliteal surface of femur, superior to medial condyle

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2
Q

Gastrocnemius

Insertion

A

-Posterior calcaneus via calcaneal tendon

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3
Q

Gastrocnemius

Innservation

A

-Tibial nerve (S1, S2)

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4
Q

Gastrocnemius

Action

A
  • Plantarflexes ankle joint

- Flexes knee joint

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5
Q

Plantaris

Origin

A

-Lateral supracondylar line of femur; oblique popliteal ligament

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6
Q

Plantaris

Insertion

A

-Posterior calcaneus via calcaneal tendon

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7
Q

Plantaris

Innervation

A

-Tibial nerve (S1, S2)

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8
Q

Plantaris

Action

A

-Weakly plantarflexes ankle joint

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9
Q

Soleus

Origin

A

-Posterior surface of head of fibula; posterior surface

of fibula; soleal line and middle third of medial border of tibia

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10
Q

Soleus

Insertion

A

-Posterior calcaneus via calcaneal tendon

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11
Q

Soleus

Innervation

A

-Tibial nerve (S1, S2)

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12
Q

Soleus

Action

A

-Plantarflexes ankle joint independent of knee position

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13
Q

Popliteus

Origin

A

-Lateral surface of lateral condyle of femur and

lateral meniscus

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14
Q

Popliteus

Insertion

A

-Posterior tibia, superior to soleal line

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15
Q

Popliteus

Innervation

A

-Tibial nerve (L4, L5, S1)

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16
Q

Popliteus

Action

A

-Weakly flexes knee and unlocks it by laterally
rotating femur 5° on fixed tibia
-Medially rotates tibia of
unplanted limb

17
Q

Flexor Digitorum Longus

Origin

A

-Posterior and medial surface of tibia inferior to

soleal line

18
Q

Flexor Digitorum Longus

Insertion

A

-Bases of distal phalanges of lateral four digits

19
Q

Flexor Digitorum Longus

Innervation

A

-Tibial nerve (S2, S3)

20
Q

Flexor Digitorum Longus

Action

A
  • Flexes lateral four digits
  • Plantarflexes ankle
  • Supports longitudinal arches of foot
21
Q

Flexor Hallucis Longus

Origin

A

-Posterior and inferior surface of fibula; inferior

part of interosseous membrane

22
Q

Flexor Hallucis Longus

Insertion

A

-Base of distal phalanx of great toe (hallux)

23
Q

Flexor Hallucis Longus

Innervation

A

-Tibial nerve (S2, S3)

24
Q

Flexor Hallucis Longus

Action

A
  • Flexes great toe at all joints
  • Weakly plantarflexes ankle
  • Supports medial longitudinal arch of foot
25
Q

Tibialis Posterior

Origin

A
  • Interosseous membrane
  • posterior tibia inferior to soleal line
  • posterior fibula
26
Q

Tibialis Posterior

Insertion

A
  • Tuberosity of navicular, cuneiform, cuboid
  • sustentaculum tali of calcaneus
  • bases of 2nd, 3rd, and 4th metatarsals
27
Q

Tibialis Posterior

Innervation

A

-Tibial nerve (L4, L5)

28
Q

Tibialis Posterior

Action

A
  • Plantarflexes ankle
  • Inverts foot
  • Supports medial longitudinal arch of foot

Gross Anatomy Muscles (12 decks)

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